Ventilator



June 19, 1928'.

C. M. WILLS VENTILATOR 2 sheets-sheet l l l l I l l I l l l l l l I J l Filed Feb. 2, 1927 June 19, 1928. 1,674,186

c. M. wlLLs VENTILATUR Filed Feb. 2, 1927 2 sheets-sheet 2 j? un L, ATTORNEY Patented .lune4 19, 1928.

UNITED, STATE-s PATENT CHARLES .'MI.' WILLS, OF ATLANTIC CITY, NEW JERSEY, ASSIGNOR T0 THE .or-'Fica TRANSOMCO. INC., 0F PHILADELPHIA, PENNSYLVANIA.

vnNrrLaron.

My invention relates to ventilators, or similar devices, and refers particularly to devices of this character which are light-proof f while allowing. the passage of air therethrough'.

It is frequently desirable to have ventilators,4 allowing the passage of air but preventing the passage of light, and while many l attempts have been made to produce devices 1n of this character, many of them are not so Aconstructed as toabsolutely prevent the pas` sage of all light-'a condition which is inoperative where the devices are employed for p otographic or X-ray dark rooms in which the admission of the slightest amountl of light is highly objectionable and renders the device useless for thex particular work described.

Devicesof this character usually consist of a plurality of over-lapping leaves, so positioned as toprevent the passage of aconsiderable amount of light while allowing the passage of air.

Devices of-this construction have failed to be rabsolute preventers of all light passage because of. the practical impossibility of roducing a complete and perfect abutment etween the extremities' of the leaves, or louvers, and the inner faces of the top and bottom of the supporting rame, and unless such abutment is perfect, light will be reflected through the interstices. This isparvticularly true in the most economical formv of ventilator, that in which the leaves are cut out of the sides of the device and turned inwardly. In this construction complete top and .bottom abutment is impossible.

I have overcomethis objectionable, and at times serious, feature of ventilators of this '40 character by placing a longitudinal tongue at each the top and the bottomof the device, the' tongue resting vupon the bottom plate or top plate, 'an 'the leaves, or louvers, butting upon the tongue. v

Inl he device of my invention, it is immateriallif the. leaves do not abutperfectly upon the top and bottom plates, as the longitudinal tongue of my device prevents the passageof light through the device even if 50 some does pass between the leaves and the frame. 'Furthelg my device has a hinged soundy proof'door carried by a side plate of the delproof, ventilator -allowing of vice, thus. operating with` the device to produce a slngle unitary sound-proof, lightair therethrough.

The advantages of the device of my invention will beevident upon a consideration of theaccompanying drawings. v

In the accompanying drawings'illustrating modified forms ofthe device of m invention, similar parts are designated" by similar numerals.- j

Figure 1 is a front view of one form 'of my 'device'partly broken away for clearness of descriptlon and inserted within a transom opening.

Figure 2 is a side view of one form of'my device, partly brokenaway for clearness of descriptlon.l f

Figure is a cross-section through the line 3%-3 4of Figure 2.

Figure 4 is a cross-section through the line of Figure 2.

Figure -5 is. a. cross-section through the Figure 7 .'s a vertical cross-section of av ummm the passage of I l modified form of lthe. bottom channel element.

The particular form .of the device of my invention, shown in the accompanyln drawings, comprises the two channel en pieces 1 0, 10 and the upper, or top, channel 11 and v the lower, or bottom, channel 12. The upper channel 11 has a4 downwardly extended longitudinal tongue 13, andthe lower 'channel 12 has an upwardly extended longitudinal ton ue 14. l

he outer faces ofthe device'are. formed of two plates 15, 15, each having a' plurality of inwardly extended longltudlnal louvers,

or shutters, 16, 16, said shutters. being stamped, or cut, out of the sheets and bent inwardly at such angles that airmaypass through the openings 17,17 but that the passage of light therethrough is prevented. The leaves, or shutters 16, 16 abut upon the tongues 13 and 14, forming a light proof jointure therewith.

. It will thusbe seen that the tongues..13, 14 preventthe passage of li'ght'between the tops and bottoms of the louvers 16, 1 6 and the channels 11 and 12, which would otherroo the opening 26, allows the catch to be opopening,

wise occur because of the ractical impossi-f bility of making an'abso utely light-proof jointure between the up er and lower edges of the louvers 16, 16an the channels 11 and 12.

In the modification shown in Figure 6, the tongue 14 is va separate piece iixedly' attached to the channel 12, instead ofy being an integral part thereof, as shown in the other drawings.

A practically sound-proof `door 18 is hinge at 19,19 to the lower portion of one of the side members-15. Positioned within the ,upperl portion of the door is a s ring catch'l21, the head 22 of `.the catch being capable of insertionw'ithin the locking member-23 carried by thel u per portion of the side member 15, the cushion, or fabric covered knob 24 connected-to the catch by means of the connecting rod 25, movable through crate Itwill be noted thatthe entire device, including'both the Ventilating elements and the hinged sound-proof door is a single unit, capable of entire insertion within a transom thus presenting a simple and an 'economical sound-proof, light-proof, airadmitting ventilator capable of being easily and readily installed.

I do not limit myself -to the particular size,

shape, number, arrangement, or material,

of parts, as shown and described, .as these are given simply as a means for clearly describing my invention.

1. In a ventilator, in combination, aframe, two side plates having a plurality of openings therein, a plurallty of louvers extending inwardly from the side plates and so positioned as to form air passages between the` plate o enings therethroug 'and' a tongue between the louvers extendinglongitudinally of the device` at the top and bottom'. thifeof preventing the passage of light through the louver 2. In a ventilator, in combination, a frame,`

the inner -faces of and to prevent v ision a tongue between 'fthe louvers' ings therein, a plurality of louversextendying inwardly from the side plates and so vpositioned as to form air passages between the plate openings and to prevent vision therethrough and a tongue abutting u on the louvers and positioned between the ouvers extending longitudinally of the vdevice at the top and bottom thereof preventing the passage of light through the louver ends of the device 4. In a ventilator, in combination, a frame,

'two side plates having a plurality of opena plurality of louvers extendfrom the side plates and so positioned as to form air passages between the plate openings and to prevent vision therethrough, a tongue abutting upon the louvers and positioned extending longitudinally of the device at ings therein, ing inwardly' the top and bottom thereof preventing the.

passage of light through the louver ends of the device and a hinged door carried by the device capable of extending across the face thereof.

5. In a ventilator, in combination, a frame `comprising two, end pieces, a top piece and a bottom piece, an inwardly extended tongue carried by the top piece and-extending beyond the louver ends, an inwardly extended tongue carried by the bottom piece and extending beyond the louver ends, two Spa-ced side plates carried by the frame, each side piece having a pluralityof l openings therein and a plurality of inwardlyextended louvers carried by each side side of the tongues, theflouvers and tongues being so positioned as' t-allow of the passage of air through the device and to prevent vision therethrough,l

6. In a ventilator, in combination, a frame comprising two e d pieces, a top piece and a bottom piece, an inwardly extended tongue carried by the top piece and extending beyond the louver ends, van inwardly extended tongue carried by the bottom piece and extending beyond the louver ends, two spaced side plates carried-by the frame,-each side piece havin a plurality of openings therein and a plura ity of inwardly extended louvers carried by each side plate abutting upon its between the louvers4 plate upon its respective 

